change file location and add day-six

Author: libterty

README.md

@@ -1,8 +1,9 @@
 # LeetCode Challenge
 
 -   May
-    -   Day 1: [First Bad Version](https://github.com/libterty/leetcode-challenge/blob/master/src/day-one/index.ts) :unamused:
-    -   Day 2: [Jewels and Stones](https://github.com/libterty/leetcode-challenge/blob/master/src/day-two/index.ts) :expressionless:
-    -   Day 3: [Ransom Note](https://github.com/libterty/leetcode-challenge/blob/master/src/day-three/index.ts) :hushed:
-    -   Day 4: [Number Complement](https://github.com/libterty/leetcode-challenge/blob/master/src/day-four/index.ts) :laughing:
-    -   Day 5: [First Unique Character in a String](https://github.com/libterty/leetcode-challenge/blob/master/src/day-five/index.ts) :smirk:
+    -   Day 1: [First Bad Version](https://github.com/libterty/leetcode-challenge/blob/master/src/may/day-one/index.ts) :unamused:
+    -   Day 2: [Jewels and Stones](https://github.com/libterty/leetcode-challenge/blob/master/src/may/day-two/index.ts) :expressionless:
+    -   Day 3: [Ransom Note](https://github.com/libterty/leetcode-challenge/blob/master/src/may/day-three/index.ts) :hushed:
+    -   Day 4: [Number Complement](https://github.com/libterty/leetcode-challenge/blob/master/src/may/day-four/index.ts) :laughing:
+    -   Day 5: [First Unique Character in a String](https://github.com/libterty/leetcode-challenge/blob/master/src/may/day-five/index.ts) :smirk:
+    -   Day 6: [First Unique Character in a String](https://github.com/libterty/leetcode-challenge/blob/master/src/may/day-six/index.ts) :relaxed:

src/index.ts

@@ -1,3 +1,6 @@
-export * from './day-one/index';
-export * from './day-two/index';
-export * from './day-three/index';
+export * from './may/day-one/index';
+export * from './may/day-two/index';
+export * from './may/day-three/index';
+export * from './may/day-four/index';
+export * from './may/day-five/index';
+export * from './may/day-six/index';

src/day-five/index.ts renamed to src/may/day-five/index.ts

@@ -7,7 +7,7 @@ interface MapObject {
     [key: string]: number;
 }
 
-var firstUniqChar = function (s: string): number {
+export const firstUniqChar = function (s: string): number {
     const stringToArr: string[] = s.split('');
 
     const map: MapObject = stringToArr.reduce((allChar: MapObject, char: string) => {

src/day-four/index.ts renamed to src/may/day-four/index.ts

@@ -0,0 +1,25 @@
+/**
+ * @param {number[]} nums
+ * @return {number}
+ */
+interface MapObject {
+    [key: string]: number;
+}
+
+export const majorityElement = function (nums: number[]): number {
+    const toStrMap: MapObject = nums
+        .map((i) => i.toString())
+        .reduce((allChar: MapObject, char: string) => {
+            if (char in allChar) {
+                allChar[char]++;
+            } else {
+                allChar[char] = 1;
+            }
+            return allChar;
+        }, {});
+
+    const strToArr: [string, number][] = Object.entries(toStrMap).sort((a, b) => b[1] - a[1]);
+    return Number(strToArr[0][0]);
+};
+
+majorityElement([1, 2, 3, 1]);